Automatic sprinkler.



G. 1. ROGKWOOD. AUTOMATIO SPRINKLER. nruon'm'lf Hum .mm a. 1908.

Wz'nesses fnenor A? [7. 7M George [R00 oocl.

Patented July 6, 1909.

GEORGE I. ROCKWOOD, OF WORCESTER, MA SSACBUSETTS.

AUTOMATIC SPRINKLER.

Specfication of Letters Patent.

Patented July 6, 1909.

Original application filed February 4, 1908, Serial No. 414,194. Divided and this application filed June 8, 1908. Serial No. 437,241.

To all whom it may co'n'cern:

Be it known that I, Gno1ien I. Roonwoon, a citizen of the United States, residing at Worcester, in the county of VVorccster and Commonwealth of Massachusetts, have invented a new and. useful improvemcnt in Automatic Sprinklcrs, of which the following is a specification, accompanied by drawings forming a part of the same, and forming a divisional application of my pending application, Serial No. 414,194, filed February 4, 1998, in which- Figure 1 is an elcvation of a sprinkler system in which my improved automatic sprinklers are employed. Fig. 2 is a plan view of one of the sprinklers, and Fig. 3 is the same partly in section.

Similar reference figures refer to similar parts in the different views.

My resent invention relates to automatic sprinkl ers arran ed to be closed normally and to be opene by the action of heat, and it consists m the construction and arrangement of parts as hereinafter described and pointed out in the annexed claims.

Referring to the accompanying drawings, in Fig. 1 l have shown my im roved automatic s rinklers employed in t e lace of a series of o en sprinklers in a s rink er system for a car arn or shed. In t at figure there are two supply pipes 1 and 2, connected by a valve 3 with a water supply pipe 4. The valve 3 is a dry pipe Valve and may be of any approved construction. The pipe 1 leads to one or more closed sprinklers 5, which are arranged to open at a predetermined degree of heat and thereby release the dry pipe valve 3. Connccted with the supply pipe 2 open s rinklers are usually employcd, to which t e water is admitted by t ie opening of the valve 3.

The above described sprinkler system furnishes an opportunity for the admission of Water to the entire series of open sprinklers by the application of heat to one of the closed sprinklers, and is like that shown in my pending application, Serial No. 414,194, filed Feb` 4, 1908, of which the present is a divisional application.

My present invention comprises a series of swinging pipes 6 pivotally connected to the water supply pipe 2 in the place of the ordinary open sprinkler head. The swinging pipes 6 are connected, with a horizontal pipe 7 by a swiveled joint connection, and each carrics at its i'rce end opon spl'inklcrs 8. Each of the swinging pipes 6 is also suspendcd near its free end from an ovcrhead support, in the present instancc, ;from the pipe 7 by a link i), which is fusiblc at a predctcrmincd degree of heat. Upon the mclting' of the link 9 its supported pipe swings downward into a Vertical positionJ as shown by the (lotted lines 10.

The swiveled connection between the swinging pipes 6 and the horizontal pipe 7 is constructed as followsz-Each of the pipes 6 is screwed into a head 11 provided with a transverse tubular bearing 12, arranged to turn upon a hollow arin 13 which communicates with the pipe 7. The hollow arm 13 is closed at its outer end and is rovided with a restricted opening 14, which 1s closed by the tubular bearingr 12 when the pipe 6 is in its raised osition, supported by the link 9. VVhen, iowever, the link 9 is melted and the pipe swings into the position shown by the dotted lines 10, the opening 14 is brought into registration with an o ening 15 in the tubular bearing 12, whicli communicates with the pipe 6 and allows water to pass through the open sprinkler 8.

It is, of course, obvious that my improved swinging sprinkler may be used in dn'i'erent situations, and it is valuable in every case where a sprinkler may be required, but where its constant presence would be objectionable.

I claim,

1. The combination with a water supply pipe and a sprinkler head, a swinging pipe carrying said sprinkler head and connected with said supply pipe, thcreby forming a communication between. said supply pipe and said sprinkler head, means fuslble at a predeternnned degree of heat for holding said swinging pipe against gravity, and means operated by the movement of said pipe for opening said communication when said swinging pipe has fallen and closing said communication When said pipe is raised.

2. In a sprinkler system, the combination with a swinging pipe, a sprinkler head carried by said swinging pipe, means fusible at a predetermined degree of heat for holding said pipe against gravity in an elevated position, a water supply pipe having a communication with said swinging pipe, arranged to be closed when Ithe swinging pipe is raised and opened by the falling movement of the swingmg pipe.

3. In a sprinkler system, the combination with a swinging pipe, a sprinklel' head 08,1*- ried by said swingmg pipe, a water su ply pipe connected with smd swinging pipe y a, pivotal joint comjlalrising a tubular arm and a tubular bearing t erefor, said arm having a hole for the passage of Water communicatmg with the swing'ingl pe when the ipe is lowered and closed y the tubular Eearing when the pipe is raised., and means fusible at 8, predetel'mined degree of heat for holding sald pipe raised.

GEORGE I. ROCKWOOD.

Witnesses:

PENELOPE OOMBERBAOH, RUFUS B. FOWLER. 

